Door-spring.



PATENTED JULY 9, 1907 W. W. ROBERTSON.

DOOR SPRING.

APPLIOATION FILED mm: 11, 1906.

2 9 0 3% 4 b W i 1 8 m m i nUH 2 m n. mi;

W1 TNESSES [NVENTORJ Y 7 I A TTORNE Y5 TRE mamas Psrrns cof, WASHINGTON,n :4

UNITED STATES WILLIAM W. ROBERTSON, OF BENTON, MISSOURI.

DOOR-SPRING.

Specification of Letters Patent.

Patented July 9, 1907.

Application filed June 11,1906. Serial No. 321,214.

To all whom it may concern:

- Be it known that I, WILLIAM W. ROBERTSON, a citizen of the UnitedStates, residing at Benton, in the county of Scott and State ofMissouri, have invented a new and useful Door-Spring, of which thefollowing is a specification.

This invention has relation to door springs and it consists in the novelconstruction and arrangement of its parts as hereinafter shown anddescribed.

More particularly this invention relates to a door closer and checkpurposed to be attached to a door to facilitate in the automatic closingor the checking of the same to hold it open or closed; also, it relatesmerely to a door check without the closing feature.

The invention consists especially of a rod suitably supported forturning upon a pivot. Said rod is provided at an intermediate point witha coil which is adapted to be located opposite the edge of the door, oneend of said rod being adapted to engage the side of the door while theother end is pivotally attached to suitable spring actuating mechanismlocated upon the door jainb. A means is provided whereby the end of saidrod that engages the door may be temporarily secured in fixed positionwith relation to the same and as the said rod is pivoted on a centerdifferent from that of the door, the difference in the length of the tworadii will hold the door in the position at which the fixing of the endof the said rod to the door occurs. By releasing the end of the rod fromits fixed relation with the door, the spring mechanism operating throughthe said rod automatically closes the door. The door spring is soconstructed that it may be applied to doors that are hinged at eitherlongitudinal edge.

In the accompanying drawing: Figure 1 is a side elevation of the doorspring applied to a door, Fig. 2 is a vertical sectional view throughthe door showing the means for fixing the rod with relation to tlfedoor, Fig. 3 is a detail sectional view of a means for adjusting thetension of the spring, Fig. 4 is a side elevation of a plate and linkused upon the door, Fig. 5 is a sectional view through the door at rightangles to Fig. 2, Fig. 6 is a sectional view of a portion of the doorusing a modified form of plate and link, Fig. 7 is a perspective view ofthe link engaging end of rod as shown in Fig. 6, and Fig. 8 is a sideelevation of the modified form of link.

The door spring consists of the plate or housing 1 which is attached tothe door jamb. The pin v2 is secured at its ends in the lugs 3, 3 andthe spur wheel 4 is journaled upon said pin. The worm gear disk 5 issuitably mounted upon the plate 1 and engages the spurs of the wheel 4.The said worm gear disk 5 is concaved along its periphery as shown inFig. 3 and is provided at each end with the squared ends 6, 6 which areadapted to enter the receiving opening of a suitable I winding key (notshown).

The said squared ends 6, 6 are provided at each end of the shaft inorder that the said Worm gear disk 5 may be reversed. That is to saythat by extending one or the other of the said squared ends 6, the wormof the disk 5 is reversed in position and consequently when operated,will reverse the rotation of the spur wheel 4. Such construction isdesirable in order that the door spring may be used at either side ofthe door irrespective of the hinging of the door.

The coiled spring 7 surrounds the bolt 2 and is fixed at one end to thespur wheel 4. The upper end of said coil spring 7 bears laterallyagainst the inner end of the rod 8. Said rod 8 is provided with an eye 9which receives the bolt 2. At an intermediate point, the said rod 8 isprovided with a suitable number of coils 10, the vertical axis of thecoils being located directly opposite an edge of the door 11. Theopposite end of the said rod 8 is provided with the cross-piece 12 toeach end of which is formed a downturned end 13. The link 14 is providedat its end with the bends 15 which lies under the said cross-piece 12.

The plate 16 is fixed to the door 11 and is provided with the upturnedflanges 17 between which the said link 14 is adapted to reciprocate. Atall times the said link 14 rests flat against the side of the plate 16.At an intermediate point the said plate is provided with the guide 18and within the said guide is located a nut 19, said nut being adapted toslide within the said guide 18. The shaft 20 is screw threaded at oneend and enters the said nut 19, the extreme end of said shaft beinglocated in a perforation 22 provided in the outer portion of the guide18. The said shaft 20 passes through the door 11 through a registeringperforation in the plate 16 and through the link 14. The shoulder 22 isfixed to the shaft 20 and bears against a washer 23 attached to theopposite side of the door 11. The plate 24 is centrally perforated andreceives the shaft 20 and fits against the outer side of the shoulder22. Said plate 24 -is also fixed to the door 11. The knob 25 is attachedto the shaft 20 and its sleeve bears against the plate 24 in a mannerusually employed in door knob constructions. It will thus be seen thatas the door 11 is swung upon its hinges, the link 14 will slidelongitudinally along the plate 16 and that the link at all times liesflat against said plate. When acting as a door spring, the moment thatthe door is released when in an open position, the tension of the spring7 operating against the rod 8 will force the door into a closedposition, it being understood that the spring 7 is of suflicient lengthso that the door may be readily swung open without overcoming too greattension and that the coils 10 provided in the rod 8 at the edge of thedoor in a measure permit the said rod 8 to make a bend at this point andconsequently relieves the said rod of much strain as the varying changein direction of the side of the door, occurs in the rod 8 at a pointopposite the edge of the door. 7

When the door is opened and it is desired that th device be used as adoor check, the knob 25 is turned so that the threaded end of the shaft20 engaging the thread of the nut 19 moves the said nut 19 in the guides18 toward the link 14 and the face of the said nut impinges the sidelink 14 against the plate 16.

The end of the link 14 which is provided with the bend 15 passes underthe transversely extending portion 12 of the rod 8. The said end of thelink is under slight tension to move away from the plate 16 andconsequently the transversely extending portion 12 of the rod 8 islifted as far as possible away from the said plate 16. The other end ofthe link 14 under which the rod 8 passes limiting the outward movementof the said rod. It is obvious that when the end 19 is moved downagainst the end of the link 14 provided With the bend 15 that the saidend is depressed and the transversely extending portion 12 of the rod 6may ride over the same.

I The flanges 17 of the plate 16 are inclined and the downturned ends 13of the transversely extending portion 12 of the rod 8 pass along theedges of the said flanges.

In the form of the invention as shown in Figs. 6 and 8, the link 14 isprovided with a tongue 26. The end of the said tongue passes under thetransversely extending portion 12 of the rod 8. The said tongue isprovided with a hump 27 which normally lies against the side of the saidportion 12 of rod 8. The said tongue 26 is linked at the point 28 aroundthe link 14 and the extreme end 29 of the tongue 26 bears laterallyagainst the side of the nut 19.

By reference to Fig. 6 of the drawing, it will be observed that thenormal position of the hump 27 is against the side of the portion 12 ofthe rod 8 but when the nut 19 is depressed, said hump 27 is carried downbelow the said portion 12 of the rod 8 and the end of the said rod isfree to pass over the end of the hump 27.

Having described my invention, what I claim as new and desire to secureby Letters Patent is:

1. A door spring consisting of a rod, a spring actuated means attachedto the jamb and engaging the said rod, a link engaging the end of saidrod, and a means for clamping said link against the door.

2. A door spring consisting of a rod, a spring actuating means attachedto the door jamb and engaging the'said rod, a plate attached to the doorand having a guide, a. link pivotally attached to the end of said rodand adapted to reciprocate upon said plate, a shaft journaled in thedoor and having a screw thread, a nut threaded upon said shaft andadapted to reciprocate within the plate guide,

and a suitable means for rotating said shaft.

3. A door spring consisting of a rod, a spring actuating means adaptedto be attached to the door jamb and engage said rod, a link having bentends which engage and receive the end of said rod, a plate attached'tothe door and supporting said link and clamping means cooperating withsaid plate and adapted to impinge said link.

4. A door spring consisting of a rod, a spring actuating means adaptedto be attached to a door jamb and engaging said rod, said rod having atone end a cross-piece provided with downturned ends, a link attached tosaid rod, a plate adapted to be attached to the door and supporting saidlink and clamping means adapted to coiiperate With said plate to impingesaid link.

5. A device of the character as described-consisting of a rod attachedat one end to the door jamb, a link attached to the door and having aspring member passing under the end of the rod, said spring memberhaving a hump which passes behind the rod.

In testimony that I claim the foregoing as my own, I

have hereto aflixed my signaturein the presence of two Witnesses.

WILLIAM \V. ROBERTSON.

Witnesses ERNEST L. GRANT, JonN McWILniAMs.

